Personal data from more than four million Community Health Systems patients was stolen in a security breach earlier this year, the hospital management company disclosed on Monday.
CHS, owner of Tennova Healthcare, said the data were stolen during a cyber attack believed to have originated in China in April and June of this year. Compromised data included names, addresses, birthdays and Social Security numbers from patients who had been to CHS facilities in the last five years. Credit card information and medical records were not compromised, the company reported.
The number of affected patients in the Tennova system was not disclosed on Monday. Tennova operates six hospitals in Knox, Cocke, Jefferson and Campbell counties.
Community Health Systems said it plans to provide identity theft protection services to patients whose data were stolen. The company will notify those patients by mail.